Arylmercaptonaphtholactams

ABSTRACT

Naphtholactam derivatives bearing one or two arylmercapto groups. The compounds are intermediates for the production of for example disperse dyes and basic dyes.

o i U rte States Patent 1 [111 3,853,911 Schefczik Dec. 10, 1974 ARYLMERCAPTONAPHTHOLACTAMS [76] Inventor: Ernst Schefczik, 7 Dubliner Strasse, Primary Examiner-Elbert Roberts 6700 Ludwigshafen Germany Attorney, Agent, or FzrmJohnston, Kerl, Thompson & Shurtleff [22] Filed: July 11, 1973 [2l] Appl. No.: 378,222 ABSTRACT Naphtholactam derivatives bearing one or two arylmercapto groups. The compounds are intermediates [52] U.S. Cl. 260/3265 S, 260/228}; for the production of for example disperse dyes and 51 Int. Cl C07d 27/00 basc dyes' [58] Field of Search 260/3265 S, 326.5 SA, 2 Claims, N0 Drawings ARYLMERCAPTONAPHTHOLACTAMS The invention relates to compounds of the formula in which R is hydrogen or unsubstituted orsubstituted alkyl,

cycloalkyl, aralkyl or aryl;

R is hydrogen, methoxy or ethoxy;

R is hydrogen or methoxy;

one X has the formula -SAr;

the other X is hydrogen, chloro or -SAr;

X and R together may be a radical of the formula:

Ar is unsubstituted or substituted phenyl or naphthyl;

and R is hydrogen, alkyl or alkoxy.

Alkyl R has particularly one to eight carbon atoms and may bear for example hydroxy, alkoxy, carbalkoxy, cyano or acyloxy as a substituent. Examples of substituents for the cycloalkyl radical are alkyl groups and for the aralkyl radicalshalogen, alkyl or alkoxy.

Aryl radicals may for example bear halogen, alkyl or alkoxy as substituents.

Examples of individual radicalsR 'arez'n-propyl, isopropyl, n-butyl, isobutyl, hexyl, B-ethylhexyl', B-hydroxyethyl, B-hydroxypropyl, B-methoxyethyl, B-methoxy-' propyl, B-ethoxyethy], B-ethoxypropyl, cyclopentyl, cyclohexyl, methylcyclohexyl, benzyl, phenylethyl, pmethylbenzyl, methoxyphenylethyl, phenyl, chlorophenyl, methylphenyl, methoxyphenyl and ethoxyphenyl and particularly hydrogen, methyl, ethyl, B-cyanoethyl and B-carbalkoxyethyl of l to 4 carbon atoms in the alkoxy moiety, i.e., for example B-carbometh oxyethyl, fi-carboethoxyethyl and B-carbobutoxyethyl.

2 in which R is hydrogen, methyl, ethyl, B-cyanoethyl or B-carboalkoxyethyl and Y is hydrogen, chloro, methyl, methoxy or amino are of particular importance.

The new compounds may be prepared by reacting a compound of the formula (II):-

in which X is hydrogen, chloro or bromo and at least one X is halogen with a compound of the formula (III):

or a salt thereof, particularly an alkali metal salt of an arylthiol.

When R is hydrogen radicals R may also be introduced subsequently by alkylating agents such as esters of strong acids, epoxides or acrylic esters.

The starting materials for the production of the cyclic compounds of the formula (IV):

which may be converted into the cyclic compounds for example by diazotization and cyclization with elimination of nitrogen in the presence of copper salts.

- Analogous reactions are known for example from German Pat. No. 1,297,259.

Details of the preparation will be found in the following examples in which parts and percentages are by weight unless otherwise stated.

from amyl alcohol.

EXAMPLE 1 EXAMPLE 2 248 parts of S-bromo-l,8-naphtholactam, 138 parts of 4-methylthiophenol and 150 parts of anhydrous potassium carbonate are introduced into 600 parts by volume of N-methylpyrrolidone. The mixture is'boiled for 6 hours under reflux and processed as described in Example l. The yield is 269 parts of 5-(4'-methylphenyl mercaptol ,8-naphtholactam having a melting point of 202 to 203C after recrystallization from glacial acetic acid. i

EXAMPLE 3 276 parts of N-ethyl-S-bromo-l ,8-naphtholactam, l35 parts of Z-aminothiophenol and 150 parts of anhydrous potassium carbonate are introduced into 500 parts of molten naphthalene. The whole is stirred for 6 hours at 200C and then the bulk of the naphthalene is removed in a water-jet'vacuum. The residue is stirred with 400 partsby volume of benzene; suction filtered and the filtered material is steamed after 50 parts of acetic acid has been added. The product is again suction filtered, washed with water and dried in vacuo at 80C. 263 parts of N-ethyl-5-(2.-aminophenyl)- mercapto-l,8-naphtholactam is obtained having a melting point of 166 to 167C after recrystallization from glacial acetic acid.

' EXAMPLE 4 EXAMPLE 5 327 parts of 5,7-dibrm0-1,8-naphtholactam, 240 parts of thiophenol and 290 parts of anhydrous potassium carbonate are introduced into 600 parts by volume of l-chloronaphthalene. The mixture is stirred for 6 hours at 175C and during cooling 400 parts by volume of toluene is added. After the whole has cooled it is suction filtered and the product is washed with ethano! and with 1% hydrochloric acid and dried. The yield is 374 parts of 5,7-bisphenylmercapto-l ,8- naphtholactam having a melting point of 18 1 to l82C after recrystallization from glacial acetic acid.

The following Table contains other compounds of the formula (VI):

' 40 obtained according to the methods of Examples 1 to Example R R R R R 6 H H H 4-methoxyphenylmercapto H 7 H H H 4-chlorophenylmercapto H 8 H H H 4-carbomethoxyphenylmercapto H 9 H H H Z-arninophenylmercapto H 10 H H H Z-amino-S-methylphenylrnercapt H l l H H H 2-amino-6-methylphenylmercapto H 12 H H H 2-amino-5 -rnethoxyphenylmercapto H l 3 H H H 2-amino5 -ethoxypl1enylmercapto H l 4 H H H 2-chloro-5-trifluoromethylphenylmercapto H l 5 H OC H, H phenylmercapto H l 6 H H -OCH=, 4-chlorophenylmercapto H [7 -CH H H 4-methylphenylmercapto H 18 CH; H H Z-aminophenylmercapto H 19 CH H' H 3-trifluoromethylphenylmercapto H 20 C H OCH H 1,-methylphenylmercapto H 2 1 CH;, H OCH;, 4-methoxyphenylmercapto H 22 C,H H H Y phenylmercapto H 23 -C=H H H 4-methylphenylmercapto H 24 C,H,, H H 4-methoxyphenylmercapto H 25 C,H H H 1 4-chlorophenylmercapto H 26 C,H H H 4-acetaminophenylmercapto H 27 -C,H,, H H 2,5-dichlorophenylmercapto H 28 C=H, H H I v4-phenylphenylmercapto H 29 C,H H H l-naphthylmercapto H 30 -CH,CH OCH, H H 4-methylphenylmercapto H 31 CH(CH, H H phenylmercapto H 32 (H(CH H H 4-chlnrophenylmercapto H 33 "(EH H H 4-chlorophenylmercapto H 34 -(,H,. H H 2.5-dichlnrophcnylmercupto H 35 (HJHAN ll H 4-mcthylphcuylmercuplo ll 36 H,('H,( N H H 2-nminnphcnylmercupto H Continued Example R R' R R R 38 CH,CH,COOC H,, H H phenylmercapto H 39 CH,CH,COC H H H Z-aminophenylmercapto H 40 CH CH COOC H (n) H H phenylmercapto H 41 CH,CH COOC H,(iso) H H phenylmercapto H 42 cyclohexyl H H 4-methoxypheny1mercapto H 43 CH,C H, H H phenylmercapto H 44 -CH,C H, H H Z-aminophenylmercapto H 45 C C.; 5 H H 2-amino-5-methylphenylmercapto H 46 CH C H H H 2-amino-5-methoxyphenylmercapto H 47 CH,CH C,,H H H phenylmercapto H 48 C H H H Z-aminophenylmercapto H 49 C H.,CH (p) H H phenylmercapto H 50 H H H 4-methylphenylmercapto 4-methylphenylmercapto 5 1 H H H 4-methoxypheny1mercapto 4-methoxyphenylmercapto 52 H H H 4-chlorophenylmercapto 4-chlorophenyl mercapto 53 CH; H H phenylmercapto phenylmercapto 54 C,H,, H H phenylmercapto phenylmercapto 55 C H H H 4-methylphenylmercapto 4-methylphenylmercapto 56 C H H H 4-methoxyphenylmercapto 4-methoxyphenylmercapto 57 C H H H 4-chlorophenylmercapto 4-chlorophenylmercapto 58 CH CH OCH H H 1 phenylmercapto phenylmercapto 59 CH CH CN H H 4-methylphenylmercapto 4-methylphenylmercapto 60 CH CH COOCH H H 4-chlorophenylmercapto 4-chlorophenylmercapto 61 CH CH COOC,H H H phenylrnercapto phenylmercapto 62 -CH CH COOC H (iso) H H v phenylmercapto phenylmercapto EXAMPLE 63 having a melting pomt of 109 to 110C. The product 282.5 parts of 5-chloro-7-bromo-l,8-naphtholactam, 1 12 parts of thiophenol and 145 parts of anhydrous potassium carbonate are introduced into 1,200 parts by volume of dimethylformamide. The mixture is boiled under reflux for 12 hours and then 1,200 parts of 2% acetic acid is added. The deposited product is suction filtered, washed with water, dried and recrystallized from dimethylformamide. 221 parts of 5-chloro-7- phenylmercapto-l ,8-naphth0lactam is obtained having a melting point of 223 to 224C, chlorine content 11.8% (calculated 11.4%). V 5-phenylmercapto-7-ch1oro-1,S-naphtholactam may be prepared in the same way from the 5-bromo-7-ch10ro compound.

EXAMPLE 64 277 parts of S-phenylmercapto-l,8-naphtholactam is dissolved in 800 parts by volume of N- methylpyrrolidone at 100C. lpart of hydroquinone and parts of anhydrous potassium carbonate are added and then 120 parts of acrylonitrile is allowed to flow in. After stirring for 6 hoursat 120C the reaction mixture is poured onto a mixture of 500 parts of water, 500 parts of ice and 20 parts of acetic acid. The product deposited in the form of crystals is suction filtered, washed with waterand dried. The yield is 326 parts of N-( 2 -cyanoethyl )-5'-phenylmercapto-1 ,8- naphtholactam having a meltingpoint of 171 to 172C after recrystallization from glacial acetic acid; it is identical with the compound of Example 4.

EXAMPLE 65 A solution of 385 parts of 5.7-phenylmercapto-L8- I naptholactam in 1,800 parts by volume of dimethylis identical with the product of Example 62.

EXAMPLE 66 A mixture of 1,500 parts by volume of odichlorobenzene, 250 parts of methyl p-toluenesulfon- 'ate, 291 parts of 5-(4'-methylphenylmercapto)-1,8-

naphtholactam and 200 parts of anhydrous sodium carbonate is stirred for 6 hours at C. 200 parts by volume of 50% acetic acid is then added and the odichlorobenzene is distilled off with steam. The suspension which remains is suction filtered and the product is washed with water and dried. 299 parts of N-methyl- 5-(4'-methylphenylmercapto)-1,S-naphtholactam is obtained which has a melting point of 163 to 164C after recrystallization from acetic acid and which is identical with the compound specified in Example 17.

EXAMPLE 67 EXAMPLE 68 146 parts of 5-(2'-aminophenylmercapto)-1,8- naphtolactam (Example 9) is dissolved in 1000 parts of boiling acetic acid. 250 parts of water and .150 parts of concentrated hydrochloric acid are added. The whole is then cooled to 0C and diazotized by dripping in a solution of 35 parts of sodium nitrate in 170 parts of water. The whole is stirred for 4 hours at 0 to 5C and the diazonium salt solution is then allowed to flow into a boiling solution of 500 parts of crystallized cupric sulfate in 5000 parts of 10% acetic acid. The whole is then boiled for 1 hour under reflux and the deposited product is suction filtered while hot and washed with hot water. After drying 136 parts of a red compound of the formula (Vll) (with R R R= H) is obtained; after recrystallization from nitrobenzene it has a melting point of 351 to 352C.

Compounds of the formula (VII) specified in the following Table are prepared by the same method:

A mixture of 400 parts by volume of odichlorobenzene, 55 parts of the compound of Exampie 68, 50 parts of methyl p-toluenesulfonate and 40 parts of anhydrous potassium carbonate is boiled for 4 hours. 40 parts of acetic acid is then added and the dichlorobenzene is distilled off with steam. The suspension is suction filtered and washed with hot water. After drying 56 parts of a red compound of the formula (VII) in which R CH R R H is obtained which after it has been recrystallized from chlorobenzene melts at 226C and is identical with the compound specified in Example 73.

EXAMPLE 87 55 parts of the compound obtained according to Ex ample 68 is dissolved in 500 parts by volume of N- methylpyrrolidone at 120C. There are then added successively 0.2 part of hydroquinone, 24 parts of acrylonitrile and 4 parts of anhydrous potassium carbonate. The whole is stirred for 8 hours at 120C and then poured into 2,000 parts by volume of 0.5% hydrochloric acid. The precipitate is suction filtered, washed with water and dried. 64 parts of a compound of the formula (VII) in which R CH CH CN and R R H is obtained. After it has been recrystallized from amyl alcohol the red crystals melt at 229 to 230C. The compound is identical with the compound described in Ex ample 78.

' EXAMPLE 88 40 parts of ethyl acrylate is used instead of the acrylonitrile in Example 87 and the procedure described therein is otherwise followed. 72 parts of a compound of the formula (VII) in which R CH' CH COOC H and R R H is obtained. After it has been recrystallized from ethanol it has a melting point of to 136C. The product is identical with the compound of Example 80.

EXAMPLE 89 248 parts of 5-bromo-N-ethyl-l,S-naphthoIactam, 170 parts of 2-thionaphthol and parts of potassium carbonate are introduced into 1,000 parts by volume of dimethylformamide and the whole is boiled under reflux for 8 hours. During cooling 400 parts of 10% acetic acid is added. After cooling the product is suction filtered, washed with hot water and dried. 289 parts of 5- (naphthyl-2)-mercapto-I ,S-naphtholactam is obtained having a melting point of 216C after it has been recrystallized from acetic acid;

The following compounds are obtained analogously:

EXAMPLE 90 I claim: 1. An arylmercaptonaphtholactam of the formula (I):

in which R is hydrogen or unsubstituted or substituted alkyl,

cycloalkyl, aralkyl or aryl; I R is hydrogen, methoxy or ethoxy; R is hydrogen or methoxy; 7 one X is S-Ar; and the other X is hydrogen, chloro or S-Ar;

X and R together may be Ar is unsubstituted or substituted phenyl or naphthyl; in which and R is hydrogen, alkyl or alkoxy.

2. A compound as claimed in claim 1 and having the formula (Ia) or (lb):

R is hydrogen, methyl, ethyl, B-cyanoethyl or B-carl5 boalkoxyethyl; and Y is hydrogen, chloro, methyl,

methoxy or amino.

UNITED STATES PATENT AND TRADEMARK OFFICE CERTIFICATE OF CORRECTION PATENT NO. 3 3,853,911

DATED December 10, 1974 INV ENTOR(S) I ERNST SCHEFCZIK It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the heading, insert[73] Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft, Ludwigshafen/Rhein,

Germany;

In the heading, insert[30] Foreign Application Priority Data, July 11, 1972, Germany, P 22 33 937.3--.

Signed and Sealed this fourth Day Of November I 975 [SEAL] A ttes t:

RUTH C. MASON C. MARSHALL DANN A! [P511718 ff Commissioner oj'PaIenIs and Trademarks 

1. AN ARYLMERCAPTONAPHTHOLACTAM OF THE FORMULA (1):
 2. A compound as claimed in claim 1 and having the formula (Ia) or (Ib):- 